Guarantees (Details) (USD $)						6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Financial Standby Letter Of Credit [Member]	Jun. 30, 2014 Risk Participation Agreement [Member] Indirect Guarantee Of Indebtedness [Member]	Jun. 30, 2014 Not Designated as Hedging Instrument [Member] Risk Participation Agreement [Member] Indirect Guarantee Of Indebtedness [Member]	Jun. 30, 2014 Minimum [Member] Risk Participation Agreement [Member]	Jun. 30, 2014 Maximum [Member] Risk Participation Agreement [Member]
Guarantor Obligations [Line Items]
Standby letters of credit, net liability			$ 3,400,000
Contractual amount of letters of credit, guaranteed maximum potential future payments			340,100,000
Term, in years						3 years	11 years
Derivative Liabilities	(12,642,000)	(13,329,000)			(192,000)
Notional amount of underlying interest rate swaps associated with risk participation agreements	$ 787,985,000	$ 740,332,000		$ 71,900,000